JPS6314574B2 - - Google Patents

Description

Detailed Description of the Invention This invention is installed in an insulated manner on the rotating shaft of a rotating electric machine, and has a brush in sliding contact with the outer periphery to send power to the coil of the rotating part, and vice versa. The present invention relates to a slip ring device in which a metal ring for extracting a current to the outside is fixed to the outer periphery of a cylindrical molded resin material. In particular, this invention relates to a slip ring device made of a ring made by molding, a terminal, and an insulating material. It is related to.

1 and 2 are cross-sectional views showing a conventional slip ring device of this type. First, in the first conventional slip ring device shown in FIG. A pair of metal rings 2 and 4 are electrically and mechanically connected to each other by spot welding or the like at predetermined positions on the inner circumferential surfaces of both metal rings 1 and 5. , 3 is one terminal 2
This insulating tape 3
is provided to electrically insulate the terminal 2 and one metal ring 5 before molding the mold resin material 6.

Next, in the second conventional ring shown in FIGS. 2A and 2B, first, as shown in FIG.
After the pair of terminals 8 and 9 are electrically and mechanically connected together by spot welding or the like at a predetermined position on the inner circumferential surface of the wide metal ring 7, a predetermined thickness is applied to the inner circumferential surface of the wide metal ring 7. After molding the mold resin material 10, as shown in FIG. 2B, the wide metal ring 7 is divided into two parts and a pair of metal parts electrically insulated from each other is placed approximately in the middle of the wide metal ring 7. Cut grooves 7c for forming rings 7a and 7b are provided by machining.

Since the conventional slip ring device is constructed as described above, in the first conventional device shown in FIG. Not only is this work extremely troublesome and requires a considerable amount of work time, but also a split mold must be used for the molding resin material 6 due to the form of this slip-spring device. Setting the metal ring into the mold,
Moreover, the work of taking out the product from the mold was extremely troublesome and took a lot of time, resulting in poor workability. In addition, in the second conventional device shown in FIG. 2, one terminal 8 is deformed by the pressure of the inflowing resin, so that it does not come into contact with one metal ring 7b.
Not only is it necessary to thicken the plate thickness of the terminal 8 or attach reinforcing ribs 8a to the terminal 8, but also the cut grooves of the wide metal ring 7 are formed by machining after molding the molded resin material 10. When the cut groove 7c is provided, the cut groove 7c also extends to the molded resin material 10 as shown in FIG. 2B, which has the disadvantage that the molded resin material 10 becomes brittle.

This invention was made with attention to this point, and not only can thin plate terminals be reinforced, but they can also be reinforced without wrapping insulating tape as in the past.
The insulation between the metal ring and the terminal can be ensured, and no space is formed between the pair of metal rings, which improves the strength of the product. By not using split molds, the molding process is simplified and costs are reduced. It is an object of the present invention to provide a remarkable slip-ring device.

That is, FIGS. 3A, B, and 4 all show one embodiment of the present invention, and FIG. 3A shows a cylindrical inlet molded in advance into a predetermined shape using a molded resin material. Silate sleeve 1
5, and FIG. 3B is a side sectional view thereof, in which a pair of metal rings 1 are fitted to the outer periphery of the insulating sleeve 15 at the middle part of the outer periphery thereof.
This metal ring 1 is used to insulate between 1 and 13.
A flange 15b having the same outer diameter as those of the metal rings 11 and 13 is formed, and a flange 15b is formed on both outer peripheral edges of the insulating sleeve 15 at predetermined positions on the inner peripheral surfaces of the metal rings 11 and 13, for example by spot welding. In order to allow the pair of terminals 12 and 14, which are electrically and mechanically connected to each other, to pass through and protrude from the inside to the outside, the insulating sleeve 15 is provided with an A plurality of slits 15a are formed to allow the melted mold resin material 16 to easily penetrate into the inner surfaces of the metal rings 11 and 13 when molding the mold resin material 16 of a predetermined thickness and made of the same material as the sleeve 15. There is.

As described above, the slip ring device of the present invention includes a plurality of metal rings 1 fitted on the outer periphery of both sides.
1 and 13, and a plurality of slits 15a through which a plurality of terminals 12 and 14, which are integrally coupled to predetermined positions on the inner peripheral surfaces of the metal rings 11 and 13, are inserted and protrude from the inside to the outside. An insulating sleeve 15 of a predetermined shape made of a molded resin material having a predetermined shape is molded in advance, and metal rings 11 and 13 having terminals 12 and 14 are attached to the insulating sleeve 15.
After the insulating sleeve 15 is temporarily assembled, the insulating sleeve 15 is assembled into an ordinary molding die, and a molding resin material 16 is molded. At this time, the mold resin material 16 fills all the spaces in the slit 15a, and therefore reaches the portion facing the flange 15b, thereby making the bond between the insulating sleeve 15 and the mold resin material 16 strong.

Therefore, according to the slip ring device of the present invention, the insulating sleeve 15 allows
Metal ring 1 built into the molding die
1, 13 and the terminals 12, 14 will not move, and there is no risk that the thin and elongated terminals 12, 14 will be deformed by the pressure of the inflowing resin or come into contact with the metal rings 11, 13. This greatly contributes to reducing equipment costs and improving quality. Further, according to the present invention, when finishing the outer periphery of the slip ring device after molding, the space between the metal rings 11 and 13 is
Since there is no space due to the presence of the flange 15b of the insulating sleeve 15 and the molded resin material 16, cutting is extremely easy, and chips are also removed reliably. Furthermore, according to the present invention, due to the presence of the insulating sleeve 15, the amount of resin during molding with the molding die is significantly reduced.
The amount of shrinkage caused by cooling after molding is extremely small, and the adhesion strength of the molding resin material 16 to the metal rings 11 and 13 is increased.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional slip ring device, FIGS. 3 and 4 each show an embodiment of the present invention, and FIG. 3A is a front view of an insulating sleeve. 3B is a side sectional view thereof, and FIG. 4 is a longitudinal sectional view of the slip ring device according to the present invention. In the drawing, 11 and 13 are metal rings, 12 and 14
is the terminal, 15 is the insulating sleeve,
15a is a slit, 15b is a flange, and 16 is a molding resin material. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. An insulating sleeve having a flange projecting from the outer periphery of the center and having a plurality of slits cut from both end faces to approximately the center, the insulating sleeve separated by the flange. a metal ring fitted on the outer periphery of both sides of the rate sleeve; a terminal joined to the inner periphery of each of these metal rings at the slit portion of the insulating sleeve and drawn out from inside the insulating sleeve; and a slip ring device made of a molded resin material formed on the inner periphery of the insulating sleeve so as to embed the terminal. 2. The slip ring device according to claim 1, wherein the outer diameter of the flange of the insulating sleeve and the outer diameter of the metal ring are substantially the same.